河南省沿黄区地下水水化学特征及形成机理
Hydrochemical characteristics of groundwater and its formation mechanism in area along the Yellow River in Henan Province
邓晓颖 1简康 1齐玉峰 1宋高举 1王帅 1王佳珍 1王一鸣 1宋会香 1宋雪1
作者信息
- 1. 河南省地质局生态环境地质服务中心,河南郑州 450053
- 折叠
摘要
为了解河南省沿黄区地下水水化学特征和离子主要来源,沿黄河流向在其中游段、过渡段和下游段选取5个典型剖面布设了 14个采样点,于2023年进行了 3次样品采集.运用数理统计分析、离子比图、Piper图、Durov图和Gibbs图等分析方法对研究区水化学特征和主要形成机理进行了分析,并对影响水化学组成的因素进行了讨论.结果表明:研究区优势阴离子为HCO3-,主要阳离子为Na+和Ca2+,地下水pH值范围为6.02～7.75,整体处于弱酸性至弱碱性之间,属于低矿化度水;沿黄河流向自中游到下游5个典型剖面地下水水化学主要类型分别为HCO3-Na型、HCO3-Na·Ca 型、HCO3-Na·Ca 和 HCO3·SO4-Na·Ca·Mg 型、HCO3-Na·Ca 和 HCO3·Cl-Na·Ca·Mg型、HCO3-Na·Ca和HCO3-Na·Ca·Mg型;研究区地下水水化学组成主要受到水岩作用和蒸发浓缩作用的影响,离子交换作用是区域地下水中Na+相对丰富的重要因素;相对于农业活动,工矿活动对部分研究区域地下水水化学组成影响更大,人为活动对地下水水化学组成的影响沿黄河流向逐渐增强.
Abstract
In order to understand the hydrochemical characteristics of groundwater and the main sources of ions in area along the Yellow River in Henan Province,five typical profiles were selected along the flow direction of the Yellow River in its midstream,transition,and downstream sections,a total of 14 monitoring points were laid out,and three samples were collected in 2023.Mathematical statistical analysis,ion ratio diagram,Piper diagram,and Gibbs diagram were used to analyze the hydrochemical characteristics of the study area,and the factors affecting the hydrochemical composition were discussed.The results show that the dominant anion in the study area is HCO3-,the main cations are Na+and Ca2+,and the pH value of groundwater is in the range of 6.02 to 7.75,demonstrating that groundwater in the study area is between weak acidity and weak alkaline and it belongs to low salinity water.The main types of groundwater hydrochemistry in five typical profiles from the middle reaches to the lower reaches of the Yellow River are HCO3-Na type,HCO3-Na·Ca type,HCO3-Na·Ca and HCO3·SO4-Na·Ca·Mg types,HCO3-Na·Ca and HCO3·Cl-Na·Ca·Mg types as well as HCO3-Na·Ca and HCO3-Na·Ca·Mg types.The hydrochemical composition of groundwater in the study area is mainly affected by water-rock action and evaporation concentration,and ion exchange is an important factor for relative abundance of Na+in regional groundwater.Compared with agricultural activities,industrial and mining activities have a greater impact on the hydrochemical composition of groundwater in some study areas.The influence of human activities on the chemical composition of groundwater gradually increases along the flow direction of the Yellow River.
关键词
河南省沿黄区/地下水/水化学特征/水岩作用/离子交换Key words
area along the Yellow River in Henan Province/groundwater/hydrochemical characteristics/water-rock action/ion exchange引用本文复制引用
出版年
2025
NETL
NSTL
万方数据